I've got the same problem with new Brocade 300 8/8 switch.
When i access http:\\xx.xx.xx.xx\ezsetup.html i get the following error in the java app "Switch Setup wizard cannot be loaded". I've done all steps listed in setup manual, tried to lunch it on different systems (Win XP x86, Win 7 x64, Win server 2008 R2) and different Java versions (from recomended in manual 6u24 to 7u11) and nothig helps.
Would be much appreciated for any help or advises!
Seen this one before. On your PC uninstall ALL versions of Java then connect and config the switch. This usually corrects the problem
Actually I've solved the problem and Java uninstall doesn't help.
For the first boot you have to plug only power and LAN cords, wait until switch finish it's booting and then connect to it whith EZSwitchSetup. Only after startup configuration you can plug your FC cards and etc.
The same happend when i've changed switch IP configuration, so may be it's a feature?